SQL-introduction

SQL stands for Structured Query Language. It is easy and allows you to create a database.

SQL stands for Structured Query Language. It is easy and allows you to create a database.

SQL-introduction

SQL stands for Structured Query Language. It is easy
and allows you to create a database. It is an ANSI language which allows an
user to write queries to access, modify and delete the customize data. SQL
consist of data definition language (DDL) and data
manipulation language (DML).

Data Definition Language :It is used to create, alter, drop or delete new
database tables. You can also create indexes and even make a link between
tables. The selected keywords which are used to perform the particular
task are as under:

CREATE TABLE - creates a new table

ALTER TABLE - alters a database
table

DROP TABLE - deletes a database
table

CREATE INDEX - creates an index
(search key)

DROP INDEX - deletes an index

Data Manipulation Language : It is used to getting, insert, delete and update data
in database and tables. The selected keywords which are used to perform the particular
task are as under: